Case T-244/21: Judgment of the General Court of 26 July 2023 — Luossavaara-Kiirunavaara v Commission (Environment — Directive 2003/87/EC — System for greenhouse gas emission allowance trading — Transitional free allocation of greenhouse gas emission allowances — Installations producing a product which is not covered by a product benchmark — No direct substitutability between the products — Rejection of data relating to the free allocation of allowances concerning those installations — Obligation to state reasons — Manifest errors of assessment — Equal treatment — Duty of diligence — International obligations and commitments of the European Union — Plea of illegality)